Thermowell
Thermowell HT-890283 Themowell Probe 4 1/2" X 3/4" Npt Male X 1/2" Npt Female
A nice touch with the CAT40 is the warranty that covers defects.
Thermowell 1/2" NPT Process Connection, 316 Stainless Steel, 12" (OTH046)
You will appreciate the 8100's straightforward assembly instructions.
